Under debate.
Chris Hurd believes so and he's a good reliable source of course

. Basically it *seems* to boil down to this:
1) It is NOT the same thing as Sony's "cineframe 24" mode
2) The CCDs ARE interlaced
3) It isn't the same as Canon's frame movie mode
Canon seems to have found a way to capture each field at the same time and then read this out like a normal interlaced camera. That is to say, capture the entire frame, read out field one, read out field two, combine both fields afterwords (not by interpolation but merely add 1 + 2 together since they were captured at the same time), and then perform a pulldown to a normal interlaced stream just as the DVX does with material from a progressive chip. The DVX on the other hand would capture the entire frame at once, just like the canon, and then read the data off the chip one line at a time rather than field by field.
So yeah, it would seem so. I don't understand the details yet but it seems to be the real thing just achieved by a different process than reading out each line sequentially as a progressive scan chip would (hence the reason they can't really call it "progressive" anc chose F instead).